Getting Started

Hub Installation and Setup

The Hub is the brains of your GRIT system. Install it first — everything else binds to it over a secure mesh network, and all your data stays local to the device.

The Short Version

Mount the Hub, attach the antenna, plug into a 120V outlet — 5 minutes.
Pick a central location with 120V power and a clear mesh path.
Connect over ethernet, your own Wi-Fi, or the Hub's projected Wi-Fi.
The GRIT App is a PWA hosted on the Hub — not found in the App Store.

Hub Anatomy

USB-C Power Jack — Uses the included 120V-compatible 5V 4A adapter.
Cat-5 Ethernet Port — Hard-wired network connection.
QR Code Display — Shows Wi-Fi and GRIT App connection info. Press the side button to cycle codes.
Antenna — External antenna for the mesh network.
IR Receiver — Programs IR remote controls.
Lock, Bind, and Unlock Buttons — Physical controls for system operation.

Choosing a Location

The Hub can go anywhere it can reach at least one other GRIT device. Keep these in mind so you don't have to relocate it later:

Go central. The more centrally located the Hub, the better the mesh coverage.
Plan for your network. Ethernet needs a run to a router or switch; Wi-Fi needs reliable signal at the Hub's location.
Account for barriers. Thick concrete or metal weakens the mesh. For large facilities, add a Mesh Xtndr to bridge long distances.
120V power is required.

Physical Installation

Estimated time: 5 minutes

Step 1 — Mount the Hub

Attach the Hub to a wall. If wall mounting isn't an option, it can lay flat on its back on a high shelf.

Step 2 — Attach the Antenna

Screw on the antenna and point it straight up.

Step 3 — Power On

Plug the supplied 5V 4A adapter into the jack on the bottom of the Hub, then into a 120V outlet. Boot takes up to 2 minutes. QR codes appear on the side display once the Hub is ready.

Connecting Your Hub

The GRIT system does not require internet access to operate. Internet is only needed for remote access and software updates — both recommended.

Three connection methods. Pick the one that fits your shop:

Method	Best For
Ethernet	Shops with a wired network near the Hub
Personal Wi-Fi	Shops where ethernet isn't practical but Wi-Fi is available
Hub's Own Wi-Fi	Shops without an existing network, or for quick standalone setup

Method 1 — Ethernet

Step 1 — Connect the cable. Plug one end of an ethernet cable into your router or switch, and the other end into the jack on the bottom of the Hub.

Step 2 — Open the GRIT App. Press the button on the side of the Hub to display the GRIT App IP address and QR code. Scan it, or enter the IP manually in your device's native browser.

Important. Use Safari on iPhones and Chrome on Android devices.

Step 3 — Create your account. Complete the Create Account form. Enable the optional 4-digit PIN for quick future logins, then press Continue.

Step 4 — Save the app to your home screen for easy future access.

Note. The shortcut only works when your phone is on the same network as the Hub.

Method 2 — Personal Wi-Fi

To put the Hub on your personal WPA2 network, first connect through the Hub's own projected Wi-Fi, then hand it off to your network.

Step 1 — Connect to the Hub's Wi-Fi. Press the Hub display button until the Connect to HUB WiFi QR code appears. Scan it, or select the grithub- network in your phone's Wi-Fi settings.

Step 2 — Enter the Hub Wi-Fi password: gritautomation (one word, all lowercase). This moves your phone from your regular network onto the Hub's Wi-Fi so you can reach the app.

Step 3 — Open the GRIT App. Press the Hub display button again to show the app IP address and QR code. Scan it, or enter the IP manually.

Important. Use Safari on iPhones and Chrome on Android devices.

Step 4 — Create your account. Complete the Create Account form and press Continue.

Step 5 — Hand off to your Wi-Fi. When prompted, confirm you want to connect the Hub to your personal Wi-Fi.

Step 6 — Select your network and enter your password. Pick your network from the list (press Refresh if it isn't shown), then enter the password.

Enter the password carefully. If it's wrong, you'll need to clear the Hub's network settings by holding the black display button for a full 20 seconds, then restart from Step 1.

Step 7 — Confirm the connection. A confirmation screen will display when the Hub has switched to your personal Wi-Fi.

Step 8 — Reconnect your phone to that same Wi-Fi network.

Step 9 — Reopen the GRIT App. Press the Hub display button again to show the new IP address and QR code — it will have changed after the switch. Scan or enter manually.

Important. Use Safari on iPhones and Chrome on Android devices.

Step 10 — Re-enter your account info in the Create Account form and press Continue.

Step 11 — Save the app to your home screen.

Note. The shortcut only works when your phone is on the same network as the Hub. Save the shortcut at this step — not earlier, while you're still on the Hub's own Wi-Fi.

Method 3 — Hub's Own Wi-Fi

Use this to reach the GRIT App directly through the Hub's projected Wi-Fi, without any external network.

Step 1 — Connect to the Hub's Wi-Fi. Press the display button until the Connect to HUB WiFi QR code appears. Scan it, or select the grithub- network in your phone's settings.

Step 2 — Enter the password: gritautomation.

Step 3 — Open the GRIT App. Press the display button again to show the app IP and QR code. Scan or enter manually.

Important. Use Safari on iPhones and Chrome on Android devices.

Step 4 — Create your account and press Continue.

Step 5 — Save the app to your home screen.

Note. The shortcut only works while your phone is on the Hub's own Wi-Fi.

Hub Button Access

The lock and unlock buttons on the Hub can lock or unlock the entire shop. If the Hub is mounted somewhere physical button access is a safety concern, disable button functionality in the Admin section of the GRIT App.

Troubleshooting

Symptom	Likely Cause	Fix
No QR codes on display after 5+ minutes	Power issue	Verify the adapter is fully seated and the outlet has power.
Can't find the `grithub-` Wi-Fi network	Hub still booting, or phone too far away	Wait for QR codes to appear on the display; move closer to the Hub.
Wi-Fi password rejected / Hub needs reset	Password entered incorrectly	Hold the black display button for 20 seconds to clear network settings, then restart Wi-Fi setup.
GRIT App shortcut stops working	Phone is on a different network than the Hub	Reconnect your phone to the same network as the Hub.

Still stuck after working through the troubleshooting table? Email support@gritautomation.com.